On 2016-11-12 01:07-0800 Alan W. Irwin wrote:
> On 2016-11-12 00:08-0500 Pedro Vicente wrote:
>
>> I have a couple suggestions, however
>>
>> the Cmake output is full of messages like
>>
>> CMake Error at CMakeLists.txt:18 (enable_language):
>>
>> No CMAKE_Fortran_COMPILER could be found.
>>
>> -- Configuring incomplete, errors occurred!
>>
>> these are not really errors, just features that are not detected, like a
>> Fortran compiler
>>
>> would it be possible to replace this just with a information message , like
>>
>> --detected fortran compiler
>> --fortran compiler not found
>
> I agree those "Error" messages are too loud for simply an issue with a
> missing compiler so ideally it would be good to reduce that loudness.
> I will think about methods of doing that, but it may be a bit tricky
> so no promises.
Hi Pedro:
I have addressed this issue as of commit 6dd5069. To test these
changes, I deliberately broke the Fortran compiler by specifying
export FFLAGS=-whatever
and here is the default diagnostic you now get in this case:
-- A test cmake run with language = Fortran enabled failed.
-- Specify -DENABLE_compiler_diagnostics=ON to see full CMake diagnostics
concerning this failure.
-- WARNING: no working Fortran compiler so disabling f95 binding and examples.
So it is nice and quiet by default just like you asked for.
If you specify -DENABLE_compiler_diagnostics=ON, then here are the
diagnostics you get for that case:
-- A test cmake run with language = Fortran enabled failed with the following
output:
---------------------------------------------------------------------------------------------------------
-- CMAKE_GENERATOR = Unix Makefiles
-- The Fortran compiler identification is unknown
-- Check for working Fortran compiler: /usr/bin/f95
-- Check for working Fortran compiler: /usr/bin/f95 -- broken
CMake Error at
/home/software/cmake/install-3.5.2/share/cmake-3.5/Modules/CMakeTestFortranCompiler.cmake:54
(message):
The Fortran compiler "/usr/bin/f95" is not able to compile a simple test
program.
It fails with the following output:
Change Dir:
/home/software/plplot/HEAD/build_dir/language_tests/Fortran/CMakeFiles/CMakeTmp
Run Build Command:"/usr/bin/make" "cmTC_9e5f0/fast"
/usr/bin/make -f CMakeFiles/cmTC_9e5f0.dir/build.make
CMakeFiles/cmTC_9e5f0.dir/build
make[1]: Entering directory
'/home/software/plplot/HEAD/build_dir/language_tests/Fortran/CMakeFiles/CMakeTmp'
Building Fortran object CMakeFiles/cmTC_9e5f0.dir/testFortranCompiler.f.o
/usr/bin/f95 -whatever -c
/home/software/plplot/HEAD/build_dir/language_tests/Fortran/CMakeFiles/CMakeTmp/testFortranCompiler.f
-o CMakeFiles/cmTC_9e5f0.dir/testFortranCompiler.f.o
f95: error: unrecognized command line option ‘-whatever’
CMakeFiles/cmTC_9e5f0.dir/build.make:65: recipe for target
'CMakeFiles/cmTC_9e5f0.dir/testFortranCompiler.f.o' failed
make[1]: *** [CMakeFiles/cmTC_9e5f0.dir/testFortranCompiler.f.o] Error 1
make[1]: Leaving directory
'/home/software/plplot/HEAD/build_dir/language_tests/Fortran/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_9e5f0/fast' failed
make: *** [cmTC_9e5f0/fast] Error 2
CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:18 (enable_language)
-- Configuring incomplete, errors occurred!
See also
"/home/software/plplot/HEAD/build_dir/language_tests/Fortran/CMakeFiles/CMakeOutput.log".
See also
"/home/software/plplot/HEAD/build_dir/language_tests/Fortran/CMakeFiles/CMakeError.log".
---------------------------------------------------------------------------------------------------------
-- WARNING: no working Fortran compiler so disabling f95 binding and examples.
As you can see, the above details do include the specific issue (which
in this case is that the "-whatever" option is not recognized by
gfortran). So -DENABLE_compiler_diagnostics=ON should be useful
to users when the missing or broken compiler is a surprise for them.
Finally, for completeness here are the diagnostics you get with a working
Fortran
compiler:
-- The Fortran compiler identification is GNU 4.9.2
-- Check for working Fortran compiler: /usr/bin/gfortran
-- Check for working Fortran compiler: /usr/bin/gfortran -- works
-- Detecting Fortran compiler ABI info
-- Detecting Fortran compiler ABI info - done
-- Checking whether /usr/bin/gfortran supports Fortran 90
-- Checking whether /usr/bin/gfortran supports Fortran 90 -- yes
-- Check if isnan function is available in fortran
-- Check for isnan in fortran - not found
-- NOTICE: Found: /usr/bin/gfortran
I am happy with this resolution of the issue, and thanks for drawing
it to my attention in the first place!
Alan
__________________________
Alan W. Irwin
Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).
Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________
Linux-powered Science
__________________________
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